He, however, rejected such reports and said the list of party candidates had his full support.
Party sources said Sampla, a Dalit leader who is also a Union minister, wanted the sitting MLA from Phagwara Som Parkash to be dropped in favour of a candidate of his choice.
The party's Central Election Committee, which had met yesterday, overruled him following which reports appeared that he had offered to quit in protest.
Shah is believed to have made it clear to Sampla that the party will not take any public show of dissatisfaction lightly and asked him to campaign vigrously for the state assembly polls due on February 4.